Driving mechanism for valve-grinders.



w. s. scovme.y DRIVING MECHANISM FOB VALVE GRINDERS.

w f f f////////////////l/f"" UNITED STATES PATENT OFFICE, vm-f WILLOUGHBY sscovILLn, or Wrisrnnrnnii, wisconsin.` y

DRIVING MECHANISM non venijn-emulates. d

l clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains tof'make and use'fthe same. i l

This invention relates to a valve grinding machine land has for one of its `objects to provide the device with means foi` frictionally driving the valve turning mechanisms in contradistinction to the machines now upon the market which either employ mutilated gears and pinions or pins and arms -for operating the valve turning mechanisms. Another object of this invention is to provide means for turning the valve or valve seat grinding'tool'in an alternate to and fro direction but turning the valve or valve seat grinding tool a greater distance in one direction than in the other.

Another objectk of this invention 'is to provide a iiexible connection vbetween :the drivin y seat grinding tool whereby the valve or tool may be readily moved in any lateral direction with respect to the driving mechanisms.

Another object ofthis invention is to pro- ,vide the flexible connection between the kdriving mechanismsy and the valve or tool with a telescopic connection whereby the bit for the valve or tool may be moved inwardly or outwardly ina longitudinal direction vwith respect tof the flexible connection.

Another object of this invention is to providea valve grindingjmachine which consists of feW parts, efficient and durable, and which can be sold upon the market at a nominal cost. f

These and other objects and advantages willrmore fully appear .as the nature-of theV invention is more clearly understood froml the Jfollowing description taken in connec- Vtion with the accompanyingl drawings fwherein I have disclosed a preferred eml kbodiinent oflthe invention, but which is.y susceptible to various alterations and modi-jV fcations in the conformation, constructionv and arrangement Vof parts thereof without ldeplrtirigv from the'. spirit of the invention v mechanisms and `the valve or valve claim. h

In the drawings, d f n Figure 1 isan end view of the device, the

Specification of Letters Patent. ,Patented 9, 1919, i

Application mea June 15, i917. sealy No. 174,922-: y

or exceeding 'the scope `of the appended v -k flexible connectionv being shown as *partly broken away.

Fig. 3 ya side view,` partly broken away and Ypartly in section, ofa hand-hold and showing kthe telescopic connection therein between the yshaft and the valve or tool bit? Fig. 2 isasideview of the device rshown VinFig. 1. `f

denotes Athe standards of the frame mounted; lf

"upon the base 2 whichis adapted to be secured to a ceiling or other ,suitable support through the medium" of the screwy bolts 3 orother suitable s'ecuringjmeans.

suitably mounted in lthe opposingy i ofv the ystandards l are ythe oppositely dis posed registering journals orbearings 4 and 5, yand revolublymo'unted Within thek jourvnals, 5^-is the driven' shaft l(Shaving securedupon itsprojecting end at one side of the frame the driven pulley vTiwhich is adapted to be driven by `ay belt connection with any ysuitable sourceof power, however,

,in smaller machines ay cranky handle (not shown) may be securedupon the end of the.

shaft 6 in lieu of the pulley and the device s may` be hand-operated.

SeGllred upon they shaft 6 lbetweenthe journals 4 and 5' is the ybroad-faced wheel r8 provided upon onefof its peripheral edges with Vthe outwardly inclined flange V9 which extends substantially half wayaround the circumference of the wheel 8. Thewheel 8 is also provided upon its other .peripheraly edge' with the outwardly inclined angelO which is positioned upon the wheel 8 obliquely opposite to the flange 9 and extends substantially one-thirdkof fthe distance around the lcircumference of the wheel 8.

The respective ends" ofthe' flanges 9y and..

l0, however, kterminate withrespect to each other in a manner to providesubstantially 'oppo'sitely disposed gaps or spaces therebetween.

The standards lof each jend :pair are.

yparallel 'to' each other v'but the respective pairs converge toward Veach other and are provided with the head 11. Suitably mountedthrough the head 11 is the bearing 12, which maybe of any suitable form of ing 12 is the shaft 13 having upon its end which projects within the frame the smooth- -faced pinion 14ihaving-its facetransversely beveled so that the pinion 14 is substantially frusto-conical in formation. The pinion 14 is preferably positioned v`in vertical f alineinent with the wheel 8 and therebeneath and spaced from the wheel 8. The adjacent face of the pinion 14 is of ardiameter equal to the width -of the face .of the wheel 8 and has its beveled face inclined to an angular degree equal to the inclinations of the flanges 9 and 10 upon the wheel 8 so that the beveled'face of the pinion 14 will be frictionally and efficiently engaged by the ianges 9 and 10 ofthe wheel 8 when either 'ofthe flanges 9 and 10 is brought into en gagement therewith for revolving the pinion Y 14' and the" shaft 13 in a direction in accordance with whichever flange is in engagement with the pinion 14. 1

Y The shaft 13 has interposed therein at any vsuitable and desirable point the flexible mem- .Y ber or connection 15, which is preferably ini the nature of a coil as shown, and provides for any degree of lateral movement in any direction of the free end of the shaft 13 with respect to that portion of the shaft Y13 journaled'in the bearing 12 of the frame. .Theouter end of the shaft 13 is provided i witlithe head 16 for rotatably and slidably vmounting this end ofthe shaft 13 within the .bore 17 ofthe hand-hold 18, this end of the shaft13 being provided with the elongated longitudinally extending socket 19,l preferably' square in cross section, for slidably or telescopica'lly receiving the correspond- Vingly shaped stem 20 securedupon the enlarged collar 21 of the bit 22, the collar 21 of the bit 22 beingfrotatably -retained within,

the opposite end of the'han'd-hold18 by the sleeve 23jsuitably-threaded in this end of the rhand-hold '18. The outer end of the bit 22 is provided withfthe head 24-provided upon its operating face with-the diametrically disposed rib or lug 25 adapted to engage a valve or any suitable form kof valve .seat

grinding tool.

Ther operation of the machine and the advantages attained thereby will be brieiiy described as follows.V The frame of the device is-preferably secured to the ceiling within a shop or building andthe engine or other suitabledevice having valves and valve seats to be ground is positioned substantially therebeneath and the power employed supplied to the driven pulley 7, which in turn t' will-revolve the lshaft- 6, the wheel 8 and its" Y flangessQ-and 1 0 in one direction. The valve orvalve seat, orboth-as the case may be, and

which have been-operatively engaged bythe head 24 of the bit 22, will be eiiiciently revolved first in one direction and then in the sioned by the flanges 9 and 10 due to the substantially oppositely disposed spaces providedbetween the ends vof one of the flanges and the ends of the other flange, this provision of the spaces between the flanges preventing the possibility of the flanges overlapping the operation of each' other and eliminating the possibility of abnormal torque in the shaft 13 by the too sudden reversal of the directionof the pinion 14, and

by the provision of the flexible connection 15, the operating end-of the shaft 13 may be moved or swung in any vlateral position and in any direction for grinding a plurality of valves and valve seats without having to inovethe engine or other object, and again,

by the provision of the telescopic` connection within the hand-hold and between the outer end of the shaft 13 and the bit 22, the bit may be efficiently raised or lowered for effectually operating upon valves and valve seats lying in different planes.' Another advantage attained by this invention lies in the fact that thepinion 14 is frictionally driven which not only provides for the smooth rotation of the valve or valve seat grinding tool but prevents any sudden jerks should the valve or ,valve seat grinding tool encounter obstructions such yas'chips, gaps and the like, and again, by forming one of the flanges substantially half way around the circumference ofthe wheel 8 and the other ange substantially for one-third the distance around the remaining circumference ofthe wheel 8, the' valve or valve seat grinding tool is given an efficient toand fro Y movement and atthesanie time theY valve or Patent, is

1n a valve grinding mechanism, a suspension frame having means at its upper end for attachment Vto. a' ceiling or other overhead support, a horizontal driving shaft journaledlth'rough said frame between its upper and lower ends, a lvertical driven shaft journaled through thelower fend ofthe vframe andiA extendingdownwardly fory operating a valve tool, a beveledfricti'on pinion secured on the upper end ofthe vertical shaft within the frame, and a wheel secured on the horizontal shaft within the frame above said pinion, provided at opposite edges with outstanding arcuate anges having inner beveled friction surfaces to alternately engage opposite sides of said pinion, the spaces between the ends of said fiangcs being sicient to permit the inion to be disengaged from both flanges or an interval, one flan being of an arcuate length of substantlally one half of a circle,

farther in one direction than in the other. 15`

In testimony whereof I have signed my f name to this specification in the presence of two subsoribin Witnesses.

WILL UGHBY S. SCOVILLE.

Vitnesses:

JOHN JACOBS, DENNrsoN Wmmnoox. 

